The Science of Evil, Simon Baron-Cohen, author

We've debated for eons the sources of cruelty and evil in the human mind. British psychologist and autism researcher Simon Baron-Cohen offers up a new brain-based theory that zeroes in on the lack of human empathy common to behaviors ranging from the autistic to the psychopathic. Baron-Cohen's book is "The Science of Evil: On Empathy and The Origins of Cruelty".